Re: SSB Antenna wire attachment to the backstay
Hose clamp, bulldog clamp...Wouldn't a real sailor just LASH IT with twine?
Some antiseize or dielectric paste, either one, should prevent corrosion but I'm not sure that a waterproof cover is a good idea. Bear in mind that any waterproof cover on stainless rigging is going to hide the rigging, prevent oxygen from reaching the stainless, and if it gets damp in there--the could cause crevice corrosion and failure.
Might, could, not saying it would, just raising the question that maybe, on rigging, something breathable like lashing might actually be as good a way to go as waterproofing? (And of course, more yachty. :-)